Effect of Low-dose PegIntron on ALT Normalization in Japanese Patients With Chronic Hepatitis C (Study P04508)(COMPLETED)

Inclusion Criteria: Patients with chronic hepatitis C patients (CHC) who met all of the following criteria: * At least 20 years of age and willing to sign an informed consent * Patients who can practice contraception * Patients who are classified either as relapsers or non-responders. * Weight between 45 and 100 kg * Patients willing to be hospitalized for 3 days after the start of treatment * Patients with positive HCV-RNA * Serum ALT level: Over 60 IU/L, equal to or less than 150 IU/L * Neutrophil count: equal to or more than 1,200 /mm\^3 * Platelet count：equal to or more than 100,000/mm\^3 Exclusion Criteria: * Patients with conditions which would interfere with the evaluation of therapeutic efficacy of the study drug and patients for whom assurance of safety is a concern were excluded from the study.